Fuse crimping tool



' A. W. DAY

Feb 13, 1940.,

Filed Aug. 18, 1958 Austin INVENTOR 7 ATTORNEY Patented Feb. 13, 1940 UNITED 'STTE (Granted under the act of March 3, 1883, as amended April 30, 1928; 370 0. G. 757) T FFECE This invention relates to a fuse crimping tool, and has for an object to provide an improved tool especially adapted for crimping the jacket on a fuse.

In operation, the punch l2 may be suitably operated for vertical reciprocation by any convenient hand or power operated mechanism. The punch I2 is raised vertically and the nose l6 A further object of this invention is to provide with the jacket l8 crimped therein as at 9, with 5 an improved crimping tool which crimps the the fuse base 2| in position, is dropped into its upper edge of the jacket about the face thereof, inner tapered opening l5 with the portion 21 of firmly securing the fuse base to the fuse nose. the jacket l8 left projecting thereabove. The

Still a further object of this invention is to operating mechanism is then actuated to press 10 provide a crimping tool which is self-centering, the punch l2 downwardly. 10 eliminating the guide feature necessary in prior As the punch l2 moves downwardly the types of anvils. plunger l3 contacts the top 28 of the fuse base Still a further object of this invention is to 2! and presses the fuse base downwardly tight provide a crimping tool which will handle bent into the jacket !8 against the nose base l6, cenand out of round jackets as easily and as rapidly tering it if necessary as the projecting edge por- 15 as it does perfect one tion 27 of the jacket I8 is contacted by the 45 With the foregoing and other objects inview, de ree surfa e 2'! f the p n h Th mthe invention consists in the construction, comp ssion spr n l4 t lds aft r the fuse as bination and arrangement of parts hereinafter 2! is properly positioned and centered, allowing described and illustrated in the drawing, in the angular surface 26 of the punch l2 to con- 20 which, tact the extreme edge of the projecting portion Fig. 1 is a sectional view through the anvil and 21 of jacket "3 and C e ces 0 Crimp it punch showing the fuse and plunger in elevation. inwardlyr Fig. 2 is an enlarged sectional fragmentary AS the Punch 0011131111188170 O down, t e

25 view of the tool at the commencement of the d f ja k portion 27 follows the radius of 85 crimping operation; and curvature Zl' of punch l2 and passes inwardly Fig. 3 is a similar View at the finish of the under the horizontal surface 28 of punch l2 crimping operation. until finally it is crimped inwardly and smoothly There is shown at Ill the crimping tool comin tight contact against the shoulder 23 and S111,

30 prising the anvil H, the punch l2. the center fa e 2 O us a as Shown in F 3- $0 plunger l3 and the compression spring U! for The Operating mechanism iS th n actuated to holding the plunger IS in proper relative posiraise the punch l2 vertically, allowing the comtion. The anvil II is provided with a suitably leted fuse]? to be removed therefrom. Should, tapered inner opening I5 to receive and support for any reason, the fuse be stuck to the anvil H,

the nose iii of the fuse I! therein, the nose l6 it can be easily forced outwardly therefrom by 35 having a fuse j c t s p e u y pe tool inserted through the aperture in the botthereto as at l9 into a suitably formed undercut t th t If t jacket 13 is somewhat bent groove 2!! in the nose It. As thus placed in pOSior out of round or should the jacket portion 21 tion the acket I8 1s substantially cone shaped in likewise be bent or out f round, the same will outline. A fuse base 2| must be attached to the be automatically brought into proper position by 40 fuse 1,1059 to P the n the pressure of the plunger 53 forcing the fuse This fuse base 2 is frusto-conical in shape, its base 2 into proper position and by the angular smaller end having a diameter substantially surfa Ce p6 coo emtin with the .acket rti equal to that of the larger end of the nose I5, p g J While the other end 22 of the fuse base 2! is 21 to bring accurately to the desired position 46 provided with a smoothly rounded shoulder 23. and cause fiOW 3*? culfvatm'e The upper edge 24 of the anvil H is provided under the flat surface 28 as 1t 15 crimped onto with a 45 degree upwardly extending surface the fuse base 2!. As a result thereof the pro- Which may jgin t h i t surfac 25 The cedure is greatly expedited, enabling a far greater 50 p c I2 is provided w t a complementary 45 number of fuses to be assembled and united in 50 a given period of time than was possible with any known type of crimping tool.

Other modifications and changes in the proportions and arrangements of the parts may be made by those skilled in the art without departing from the nature of the invention, within the scope of what is hereinafter claimed.

The invention described herein may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment of any royalties thereon ortherefor.

Having thus set forth and disclosed the nature of this invention, what is claimed is:

A fuse crimping tool comprising an anvil having a tapered opening to receive and support a fuse nose and conical jacket thereon, the jacket having a portion extending beyond a fuse base placed on the fuse nose, and a punch for crimping the jacket portion about the fuse base to secure it to the fuse nose; said punch being provided with a tapered portion adapted to first contact the projecting jacket portion, a complementary tapered portion on said anvil, said tapered portion of the punch being joined by a curvature to the horizontal portion adapted to overlie a correspondingly curved shoulder and horizontal portion of the fuse base to crimp the fuse jacket portion about such rounded shoulder and horizontal surface of the fuse base, a plunger reciprocal within said punch and yieldable means urging said plunger downwardly to contact a portion of the fuse base and force it into intimate contact with the jacket and nose before the punch contacts the fuse jacket.

AUSTIN W. DAY. 

